Internal-combustion engine.



1. B. BROWN. INTERNAL COMBUSTION ENGINE.

APPLICATION FILED APR.5| 1914.

1,148,571, Patented Auf. 3, 1915.

2 SHEETS-SHEET I.

L ZI/441.1%

J. B. BROWN.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED APR. e. 1914.

l l 48,57 l Patented Aug. 3, 1915.

2 SHEETS-SHEET 2.

JESSE B. BROWN, OF DETROIT, MICHIGAN.

INTERNAL-COMBUSTIQN EGINE.

Specication of Letters Patent.

Patented Aug. 3, 19154.

Nv Application filed April 6, 1914. Serial No. 829,728.

T0 all whom it may concern Be it known that I, JESSEv B. BROWN, a citizen of the United States, residing at Detroit, FMichigan, have invented certain new and useful Improvements in Internal-Cornbustion Engines, of which the following is a specification. K

This invention relates to improvements'in internal combustion engines.

This invention relates particularly to anl improved valve structure and mode of operating the saine whereby the charge is so regulated by a rejection of the surplus that great economy of operation is secured and undue and unnecessary heating is so completely avoided as to avoid the necessity for a water jacket onengines of the size adapted for automobile use.

The objects of this invention are: First, to provide an improved valve structure which controls both the intake and exhaust comprising both a sleeve and puppet valve. Second, to provide an improved valve mechanism that effectively controls the intake whereby any surplus or excess charge will be rejected and returned to the intake manifold.

Further objects, and objects relating to Y details and economies of construction and Yses operation will definitely appear from the description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification.

The invention is clearly defined and pointed out in the claims.

So much of an automobile engine as it is necessary to illustrate,l to show an embodiment of my invention is fully illustrated in of this specification, in which:

Figure I is a sectional view on the line 1 1 of Fig. II, showing details of the valve mechanism in connection with one pair of cylinders, many of the parts appearing in full lines. Fig. II is a detail sectional view taken on the line 2-2 of Fig. I. Fig. III is an enlarged detail sectional view taken on the line 3 3 of Fig. I. showing the annular port connected with the.exhaust. Fig. IV is an enlarged detail sectional view on the line 4-4 of Fig. I. showing details of the sleeve valve operating mechanism and its connection with the cam shaft. Fig. V is a Sectional view similar to Fig. II and showing a modified form of my invention.

the accompanying drawing forming a part In the drawing, the sectional views are taken looking in the direction of the little arrows at the ends of the section lines and similar numerals of reference refer to similar parts throughout the several views.

Considering the numbered parts of the drawing, the engine cylinders 1 are cast in pairs with suitable coolingfins thereon. The crank casing 2, the engine piston 3, the pitman 4, the crank shaft 5, the intake manifold 6, and the exhaust pipe 7 are all of 'the usual and desired construction and need no detailed description here as my invention does not pertain to such details.

A puppet valve 8 has a stem 8 which is slidably supported in a central tubular bearing 9 in the valve casing 11 and said valve rests in the valve seat 10 at the top of said casing. The casing 11 is cast intergral with the engine cylinder head 12 and the latter is provided with an opening therein closed by the screw threaded plug 12', said opening being provided to permit access tothe top of the puppet valve 8 and the valve seat 10. An annular exhaust port 7 is provided toward the top of the valve casing and connected to the exhaust pipe 7 and an annular intake port G is provided toward the bottom of said valve casing leading from the intake manifold 6 and the connecting passage 6. These annular ports are controlled by the Sleeve valve 24, hereinafter to be described, which reciprocates in a cylindrical core in said valve casing. The cylinder head 12 is ribbed on its outer surface to facilitate cooling and recessed to connect the cylinder with the valve port.

The puppet valve 8 is controlled by connections to the cam and the cam shaft. The lower end of valve stem 8 is provided with flange 13 retained by cross pin 14 to receive the thrust of the valve spring 15 which forces the valve 8 tight into its seat. An adjusting screw 17 is threaded into the upper end of the push rod 16 which rests upon the control thrust bar 18 above a cam on the cam shaft 19. The arm 20 of the control thrust bar 18 is connected with the pivot pin 21 on the arm 2:2 of the rock shaft 23, which rock shaft is controlled in any suitable way, either manually or by suitable connections from some convenient part as, for instance, means from the steering column of an alitoniobile. This has to do with the control of the action of the puppet valve 8 and is destem 25, and the sleeve valve 24.

scribed and claimed in my copending application, Serial 745,923, filed February 3, 1913.

The sleeve valve 24 has a suitable valve stem 25 extending downwardly therefrom and connected to the plunger 26 by means of across pin 27, see Fig. IV. The lower' end of the plunger 26 carries a yoke 28 within which engages the crank pin 19 upon the cam shaft 19. This yoke .permits of the lateral motion of the pin within said yoke and said crank pin 19 reciprocates the valve Sleeve valve 24 when in its upper position opens the, intake port 6 and a full charge can pass up through the center of the valve past the puppet valve when the latter is open. This is shown in the left hand valve of Fig. I. The sleeve 24 in this position closes the exhaust port v7 andV permits the charge to be taken in. When the charge is taken in, the sleeve 24 descends after the puppet 8 has closed under compression. lVhen the charge has been fired the puppet valve 8 is raised by the cam and opened while the Ysleeve is in itsv lowermost position and the exhaust port then being open the burnt gases pass out of the eXhaustand the engine scavenges. The upper end of the sleeve valve 24 is thickened at 24 and lits the annular enlargement 9 at the upper end of the central tubular guide 9 and thus secures a double closure of the intake while the eX- haust occurs. This is, of course, desirable in that the intake is kept free of the foul gases and undue heating is avoided.

Intermeshing gears 30 and 29 are provided to drive the cam shaft from the crank shaft in the usual Way. This is shown especially in Fig. I. The guides for the valve push rods 16 and 26 are shown directly supported in the crank casing. These guides can, of course, be supported in various ways itself and inFig. V I have shown a modified il form of my invention in whichthe valve casing is so carried.

. My improvements are shown embodied in a. four cycle engine butI they are readily adaptable to other styles. YThe valves can be differently designed and connected to do l driving means with a recessed cylinder head,

a valve casing carried by said cylinder head land having a cylindrical bore, a pair of j cam shaft for controlling said puppet valve,

bv separate brackets not necessary here tol the valve is controlled by cams or eccentrics on the cam shafts or by what means they' are controlled in the broad essence ofthek A invention.

In the preferred form of my invention, I haveshown-the valve easing 11 in which the sleeve valve 24 reciprocates as cast integrally with the cylinder head 12. This is the preferred form of my invention, but it is not necessary that e valve casing should be carried by the inder head as it might equally as Well e carried by the cylinderl annular ports in said valve casing opening into the cylindrical bore therein, a puppet valve seat at the upper end of said valve casing, a puppet valve adapted to fit in said seat and having `a valve stem, a central tubular guide in said valve casing in which said puppet valve stem is reciprocably mounted, an annular enlargement at the upper end of said tubular guide, connections tothe a passage connecting the upper of said annular ports with the exhaust port, a passageV connecting the lower of said .annular ports with the intake, a sleeve valve in said cylindrical bore adapted to close said ports alternately and having a reduced inside diameter at the upper end thereof adapted to engage the upper end of said tubular guide to out off the lower` part of said cylindrical bore when the exhaust port is open, and connections to the cam shaft for controlling said sleeve valve, all coactingV substantially as described for the purpose specified.

2. In an`internal combustion engine, the

combination with the engine cylinder, pis- 1 ton, crank shaft, cam shaftand connections, and driving means, of a valve casing having a cylindrical bore and having a pair of annular ports opening into said bore, a puppet valve seat at the end of said valve casing, a central tubular guide enlarged at its upper end, a sleeve valve in said bore adapted to close said ports alternately and thick at the upper end to fit the enlarged end of said tubular guide when in down position, a puppet valve adapted to said seat and with a stem extending into and through said tubular guide, and valve actuating means for controlling said valves.v

3. In an internal combustion engine, the combination of the engine cylinder, piston, crank shaft, cam shaft and connections, and

driving means, with a valve casing having a bore, a pair of ports opening into said bore, a puppet valve seat at the end of combination with the engine-cylinder, pis.

ton, crank shaft, cam shaft and connections and driving means of a valve casing having a cylindrical bore forming a valve chamber communicating with the said enginecylinder, a puppet valve controlling communication between said valve chamber and said engine cylinder, an exhaust port inv the' upper part of said valve chamber, an intake 'port in the lower part of said valve chamber, a sleeve valve in said valve chamber adapted to close said exhaust and intake ports alternately, a central tubular guide within said valve chamber having an enlarged upper end, said sleeve valve having a thickened upper end adapted to engage the enlarged end of said tubular guide whereby, when said exhaust port is opened, the lower portion of said valve chamber is cut off from the upper part thereof, and valve actuating means for controlling said valves, all coacting substantially as described for the purpose specified.

5. In an internal combustion engine, the combination of an engine cylinder, piston, crank shaft, cam shaft and connections and driving means with a recessed cylinder head, a valve casing carried by said cylinder head and spaced apart from the wall of said cylinder, an exhaust port and an intake port opening into said valve casing, a sleeve valve in said Valve casing adapted to close said ports alternately, a puppet valve controlling communications between said valve casing and said cylinder, and valve actuating means for controlling said valves.

In witness whereof, I have hereunto set my hand vand seal in the presence of two witnesses.

JESSE B. BROWN.

Witnesses:

EVELYN HnAvnNoR, ALFRED E. CROSBY. 

